How does the convex polygon looks like picture wise

Picture-wise, a convex nonagon is a closed shape with 9 straight line segments as its sides. All its interior angles are less than $180^\circ$, meaning it doesn't have any "dents" or inward-pointing vertices. If it's a regular convex nonagon (as implied by the question asking for "each exterior angle"), all 9 sides are of equal length, and all 9 interior angles are equal (each measuring $140^\circ$), and all 9 exterior angles are equal (each measuring $40^\circ$). It looks like a symmetrical 9-pointed star if you connect the vertices in a specific way, but as a polygon, it's just the outer boundary.